Anchor for pipes



March 27, "1951 T. F. M. WILLIAMSON ANCHOR FOR PIPES original Filed March 18, 1946 ,alfal I Il 1 IN V EN TOR. THOMAS EM, W/LL/MS/V patented Mar. 27, 1951 ANCHOR Fon PIPEs Thomas F. M. Williamson, San Francisco, Calif.,

assignor to Alexander H. Isenberg', Woodside,

Calif.

Original application March 1S, 1946, Serial No.

655,294. Divided and this application November 13, 1947, Serial No. 785,633

4 Claims.

This application is a division or continuation in part of my copending application :tiled under Serial 655,294, March 18, 1946.

This invention relates to thermal insulated pipe of the general type wherein a metal pipe is surrounded with thermal insulation, and preferably surrounding this is a heavy layer of water sealing compound such as solid asphalt, tar, or pitch, and a metal or other casing surrounds the pitch (all as generally shown in my copending patent applications filed under Serial Nos. 633,812 and 651,848, led respectively Dec. 8, 1945, and March 4, 1946, Patent Nos. 2,478,552 and 2,532,- 587), and the present invention has for its principal object the provision of means for anchoring the inner metal pipe of the assembly by plates transversely of the pipe axis so that all longitudinal expansion and contraction of the pipe in use will take place on one or both sides of the anchored point.

Other features and advantages of the invention will appear in the following description and accompanying drawings.

In the drawings Fig. 1 is a longitudinal vertical section of the simplest form of my insulated anchor applied to an insulated pipe of the type above mentioned.

Fig. 2 is a cross section of Fig. 1 taken along the line 2-2 of Fig. 1.

Fig. 3 is a cross section as of Fig. l taken along the line 3-3 of Fig. land with extending anchoring legs added (as depicted in Fig. 2 of my parent application of which this is a division in part).

Fg. 4 is a sectional view like that of Fig. 1 but showing a modified form made by reversing the position of the inner and outer plates.

Fig. 5 is a similar sectional view to Fig. 4 but shows a further modification of housing in the inner plates as shown for the single inner plate of Fig. 1.

Fig. 6 is a detail showing a modiiication for Fig. l.

Before describing the drawings in detail it may be stated that Fig. 1 is a copy of Fig. 3 of the parent application.

Fig. 2 is an obvious cross section of Fig.Y 3 of the present case. Figs. 3, 4, and 5 are obvious modifications of the original disclosure of the parent case but as they were not actually shown in the original drawings, this case has been termed a division in part of the parent case Serial 655,294.

In the drawings, I is the inner conveyor pipe, generally a steam-pipe or one used for conveying hot uids, 2 is the thermal insulation closely 2 surrounding the pipe, and which may be of any suitable kind of thermal insulating material, though preferably is the conventional magnesia base steam pipe packing applied in split sections to the pipe and wrapped with one or more layers 2 of cloth; 4 is a thick impervious layer of solid asphalt, tar, pitch, or other like material pourable when heated and solidifying upon cooling, Iwhich surrounds the cloth-wrapped thermal insulation to prevent the ingress of water, 5 is the sheet metal tubular casing which surrounds the pitch, while 3 is one of any type of spacer or spacing ring used at intervals along the assemblage to deiinitely space the sheet metal casing 5 from the thermal insulation to provide a space for the pitch 4 which is poured in while in molten condition into the casing space through one or more side openings in the casing, not shown, but well understood in the art. The numerals used on Fig. 1` are the same as used on the same showing (Fig. 3) of my parent case serieu 655,294 to preserve its identity therewith.'

All the above features are old and well known, and my improvement applied thereto as exemplied in Fig. l of the drawing, comprises a metal plate such as a substantially rigid anchor plate of steel 8 extending radially outward, preferably at right angles to the conveyor pipe I, and which may be in one or two pieces provided with an opening or notches to pass pipe I therethrough, the plate having engagement with conveyor pipe I fixed against relative longitudinal movement therebetween, and is preferably firmly welded thereto as at 9, though it may also be plates 22 preferably welded thereto as at I9.

Side fwalls or plates I8 extend inwardly and each is formed with an opening of greater diameter than the diameter of conveyor pipe I and preferably circumferentially embraces inner conveyer or steam pipe I, whereby the plates I8 are spaced from and insulated relative tothe conveyor pipa- I At opposite sides of the anchor housing are two relatively short heavy metal tubes I each` of which has one end sealed to an outer face of the respective opposite side walls I8 as by welding as at I9. These tubes are of a diameter to telescope at their other or outer ends snugly enclosing the ends of the metal pipe casing and are sealed thereto as by welding, brazing or solder joint 24 or otherwise. Thus, the tubes I0 become the outer casing in the area of the conduit which they enclose. A material which is impervious to moisture, such as a pitch or solid asphalt filling 4 extends between the outer circumference of the thermal insulation 2 and the enclosing tubes I0 and casing 5, in their respective areas up to the side walls I8 of the housing, since these side walls are thermally insulated from conveyor pipe I. In this connection it may be here noted that in all iigures and modications of the invention the moisture impervious ller 4 stops short of contact with and is thermally insulated from respective anchor members which have direct or positive bearing on or connection to the conveyor pipe I.

The periphery of anchor plate 8 is spaced radially inwardly from the outer wall 22 of the housing as well as longitudinally from its side walls I8, and these spaces therebetween are lled with a heat insulating material preferably of rigid form or sufficiently hard to stay the anchor members and side plates against relative movement being designated longitudinal spacer insulation 2D and radial spacer insulation 2|, the latter providing thermal insulation between the radially outer edge of plate 8 and the outer peripheral housing plate 22. This material may be preformed blocks of any suitable asbestos cement mixture, or may be cast in place, or the spaces may be filled with wooden blocks formed to fit, as some woods are of high f insulating properties. Any interstices should be filled with thermal cement.

With the construction as above described, and shown in Figs. 1 and 2 it will be seen that the housing I8, 22, projecting outwardly of the pipe assembly is-thermally insulated from the inner pipe I, also sealed against ingress of water, yet is rigid and immovable longitudinally of the pipe, to thereby serve as an anchor against linear expansive movement of the pipe if the housing is suitably secured or locked in place to some immovable object, to some exterior immovable object.

-The locking of the housing in a xed position to an immovable object obviously may be made in several ways by securing it to some immovable wall or foundation, one of such ways is to embed it in a concrete foundation block .as shown dotted at I5. Another way is to provide one or more iron legs or extensions from the housing which are secured to the foundation or wall as the case may be. Such legs are shown in Fig. 3 at IS welded or otherwise secured to the housing and imbedded in a concrete foundation I5, though it is obvious the extensions may be o f any shape and bolted or otherwise secured to any immovable wall or block. The employment of the legs IB provides the advantage that by severing the legs at the foundation block, the conduit system may be removed if desired.

In the modifications shown in Figs. 4 and 5 instead of using but one plate secured to the pipe and a pair of housing plates insulatedly embracing it, the position of the plates is reversed.

In Figs. 4 and 5 the corresponding parts bear 4 the same numerals as for the figures previously described to preserve their identity therewith, but in Figs. 4 and 5 two relatively spaced plates secured xedly to the pipe I are designated 8, and the blocks or hard thermal insulation are designated 2D and 2|', though the blocks of insulation positioned on the outersides and outer edges of the two plates 8" xed to the inner conveyor pipe may be of softer insulation if desired as they are not subject to compression. In Fig. 4, a central plate 25 is longitudinally spaced centrally of plates by the hard insulation 20 and insulated from the pipe I by a body of circumferential insulation 2|. The plate projects radially outward beyond the abutting ends of tubes IB and forms the anchor plate. This plate 25 may be round, square, oblong or any desired form, with or Without legs I6 as shown for Fig. 3, or may be bolted directly to any foundation or wall or embedded in concrete.

With reference to all figures of the drawing vit is to be observed that insulation members 2G and 25 may be termed longitudinal insulating mem.-y

bers because they space and thermally insulate between elements longitudinally, whereas the in.-

sulation members 2| and 2| may be termed. radial insulating members because they provide a body of thermal insulation at either an inner. or an outer edge of the plate members whosel plane is radial to the axis of conveyor pipe l, asl

is also the fact relative to the insulation body 2f in the exemplication of Fig. 1.

pressure against longitudinal movement of pipe I. This necessitates extending a metal housing.

IS outward to enclose .and seal the structure to the tubes I0 .(or casing if tubes are not used) as'Y In the present variation.

described for Fig. 1. however the central plate 25 extends radially outward beyond the housing I8' to provide a.

simple means for bolting it to a concrete wall as dotted at 26 or otherwise securing `it to a solid foundation, as explained for the other forms of the invention described.

vEach of the plates 8 and 25 in Fig. 4 ami-'the plates .8" vand 25 in Fig. 5 is provided with opening Ycentrally therethrough and through',v which the conveyor pipe I extends, as also in the plates 8 and I8 of Fig. 1. In Fig. 1 the opening of the center plate 8 abuts the .conveyer pipe and is secured thereto and the insulation 2| is around the peripheral edge, while the relatively longitudinally .spaced side plates I8 have the cen.. tral openings thereof circumferential .of and with1 insulation 2 between the conveyer pipe and .the plate opening, the .outer -peripheral portion of the plates I8 extending beyond the circumferencepfthe conduit for embedding yin anchorage I5.

But in Figs. 4 and 5 the central opening of ,re-.- spective center plates 25 and 25 rare .circumferen'' tially spaced from the conveyer pipe with ,in-5' sulation 2 therebetween, and the relatively lon-` gitudinally spaced .side plates 8" snugly encircle the conveyer pipe and are xedly secured thereto, and are insulated at the periphery by insula' tion 2 I 'I In all figures, means for securing the respec tive plates to the conveyer pipe is indicated as welding -9, and the means for securing respective olatcle yto 1an outer casing is indicated as weld" Itis also to be noted that in all exemplincations of the invention there are anchor means which extend radially beyond the conduit circumference for anchoring in some kind of anchorage exterior of the conduit, and that all of the plates of the anchor structure which have connection to the conveyer pipe l at the central opening of the plate are surrounded at the outer periphery of the plate by a body of thermal insulation material. It will be also observed that all of the plates of the anchor structure which extend radially beyond the circumference of the conduit for contact with exterior objects are circumferentially spaced from the conveyer pipe I by insulation at the central opening of the plates; further, all plates in contact with the conveyer pipe are longitudinally spaced from the plates parallel thereto which do not contact the conveyer pipe, and there is a body of thermal insulation longitudinally therebetween, indicated 2l] in Fig. 1 and in Figs. 4 and 5. Thus the anchor eliminates thermal conductivity between the conveyer pipe l and objects or anchorages exterior of the conduit with which the anchor comes in contact.

Since most, and certainly many, thermal insulating materials are also very eiiicient electrical insulators, obviously in providing thermal insulation, there may be also provided insulation from electrolysis.

From the above it will be evident to anyone skilled in the art that still other modifications may be made within the spirit of the invention and as sought to be covered in my appended claims.

I claim:

1. An anchor for an insulated pipe conduit assembly of an inner conveyor pipe enclosed within a thermal insulating jacket, in turn enclosed within a layer of solidified moisture impervious material, in turn enclosed within an outer casing, the anchor structure having a portion extending radially outwardly beyond the circumference of the conduit assembly for anchorage in a foundation externally of the conduit, and said anchor including a plurality of plate members relatively spaced longitudinally of the conduit and having opposed faces transversely of the axis of the conduit, at least one of said plates having an inner edge portion circumferential of the conveyor pipe and xedly connected thereto for preventing relative longitudinal movement therebetween, the plate so connected to the conveyor pipe having an outer casing peripherally therearound, said last mentioned plate extending radially outwardly from the conveyor pipe and being of lesser diameter than the outer casing around its periphery whereby the periphery of said plate is spaced from the outer casing therearound providing insulation space between said plate periphery and said outer casing; and another of said plates having its inner edge spaced from the circumference of the conveyor pipe, the outer portion of the last mentioned plate extending radially outwardly beyond the portion of the outer casing which houses the layer of moisture impervious material; and means between the opposed faces of said plates maintaining them in longitudinally spaced relation, the layer of moisture impervious material terminating in spaced relation to plates i'lxedly connected to the conveyor pipe, and thermal insulation material interposed between said moisture impervious layer and plates xedly connected to the conveyor pipe.

2. ln a conduit pipe assembly having an exteriorly thermally insulated inner conveyor pipe enclosed within a tubular outer casing, anchor means for anchoring said inner conveyor pipe against longitudinal movement relative to an external foundation, including a plurality of plates transversely of the conveyor pipe and relatively spaced longitudinally thereof, each plate having an opening centrally through which the conveyor pipe extends, at least one of said plate members being fixedly connected at its said opening to the conveyor pipe for preventing longitudinal movement therebetween, the periphery of said plate being spaced inwardly from the outer casing therearound, and another of said plates having the edge of its said opening of greater diameter than the diameter of the conveyor pipe whereby the edge of the opening in said last mentioned plate is spaced from the conveyor pipe so as to be free of contact therewith, said last mentioned plate extending outwardly beyond said outer casing and providing means for securing that plate to an external foundation; and thermal insulation positioned between the opposed faces of said plate members and between the conveyor pipe and the adjacent edge of the plate member which extends beyond said outer casing.

3. An anchor structure as set forth in claim 2, and in which there is thermal insulation material between the periphery of said xedly connected plate members and the outer casing therearound.

4. In a conduit pipe assembly having an eX- teriorly thermally insulated conveyor pipe enclosed within a tubular outer casing, anchor means for anchoring said inner conveyor pipe against longitudinal movement relative to an external foundation, comprising a plurality of plate members mounted transversely of and relatively longitudinally spaced on the conveyor pipe, each of said plates having a central opening therethrough through which the conveyor pipe extends, a pair of said relatively spaced plate members having engagement with said conveyor pipe xed against longitudinal movement relative thereto, said pair of plates being of less diameter than the outer casing providing a space between the periphery of said plates and the outer casing, another plate mounted on the conveyor pipe in spaced relation between said pair of plates and having its central opening of greater diameter than the conveyor pipe and free of connection therewith, said last mentioned plate extending outwardly beyond said outer casing to provide a plate portion for securing to an external foundation, the outer casing abutting opposite faces of the last mentioned plate and being sealed thereto against entry of water into the casing, and thermal insulation positioned between relatively opposed faces of said last mentioned plate and said first mentioned pair of plates.

THOMAS F. M. WILLIAMSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 451,941 La Point et al May 12, 1891 2,081,867 Gysling May 25, 1937 Re. 22,988 McLeish Mar. 16, 1948 FOREIGN PATENTS Number Country Date 430,811 France Aug. 23, 1911 

